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| grep command |
grep, egrep, fgrep, rgrep - print lines matching a pattern
Using grep to view/display content of /etc/rsyslog.conf file without comment lines
$ grep ^[^#] /etc/rsyslog.conf
Using ls and grep to list disks and partitions
$ ls /dev | grep '[s|v|x]d$*' sda sda1 sda2 sda3 sda4
--invert-match
grep -iv 'that' file.txt : Show lines that do not contain'that'
egrep - keep only those lines which have at least one of the following words: the, that, then, those.
egrep -iw 'the|that|then|those'
Use 'egrep' or 'grep -E'
egrep 'the|that|then|those' grep -E 'the|that|then|those'
Extract lines with exactly 11 characters
grep -E "^.{11}$" /usr/share/wordlists/rockyou.txt > /usr/share/wordlists/rockyou-11.txt